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Magnetic Disks p. 222 Fig. 6-3 Next What are tracks and sectors? Track is narrow recording band that forms full circle on disk Sector stores up to 512 bytes of data Formatting prepares disk for use and marks bad sectors as unusable System Defrag

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Magnetic Disks What are external hard disks and removable hard disks? p. 227 Fig. 6-12 Next External hard diskfreestanding hard disk that connects to system unit Removable hard diskhard disk that you insert and remove from hard disk drive Used to back up or transfer files

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Magnetic Disks What is online storage? p. 228 Fig. 6-13 Next Others can be authorized to access your data Service on Web that provides storage for minimal monthly fee Files can be accessed from any computer with Web access Large files can be downloaded instantaneously

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Push the same button to close the tray. Optical Discs What are optical discs? p. 229 Fig. 6-14 Next Most PCs include an optical disc drive Flat, round, portable metal discs made of metal, plastic, and lacquer Can be read only or read/write Insert the disc, label side up. Push the button to slide out the tray.

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Optical Discs How should you care for an optical disc? p. 230 Fig. 6-15 Next Do store the disc in a jewel box when not in use Do hold a disc by its edges Do not eat, smoke, or drink near a disc Do not stack discs Do not expose the disc to excessive heat or sunlight Do not touch the underside of the disc

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Optical Discs What are CD-Rs and CD-RWs? p. 232 Next Must have CD recorder or CD-R drive Cannot erase discs contents CD-R (compact disc-recordable) c disc you can write on once CD-RW (compact disc-rewritable) ce erasable disc you can write on multiple times Must have CD-RW software and CD-RW drive

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Miniature Mobile Storage Media What is a USB Flash Drive? p. 236 Fig. 6-25 Next Plugs in a USB port on a computer or mobile device Storage capacities up to 4 GB May eventually make the floppy disk obsolete